BFQ81 Datasheet, PDF (7/11 Pages) Siemens Semiconductor Group – NPN Silicon RF Transistor (For low-noise amplifiers up to 2GHz and broadband analog and digital applications)

1.0
0.8
0.6
0.4
0.2
0
0
12885
f = 1 MHz
4
8
12
16
20
V_CB - Collector Base Voltage ( V )
Figure 3. Collector Base Capacitance vs. Collector Base Voltage
2.5
2.0
Z_S = 50 Ω
1.5
Z_S = Z_Sopt
1.0
0.5
V_CE =10 V
f = 800 MHz
0
0
4
8
12
16
20
12873
I_C - Collector Current ( mA )
Figure 4. Noise Figure vs. Collector Current
4
Z_S = 50 Ω
3
Z_S = Z_Sopt
2
1
V_CE =10 V
f = 2 GHz
0
0
4
8
12
16
20
12874
I_C - Collector Current ( mA )
Figure 5. Noise Figure vs. Collector Current
Document Number 85023
Rev. 1.6, 08-Sep-08
BFQ81
Vishay Semiconductors
www.vishay.com
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